# CVE-2018-25010: libwebp: The libwebp packages provide a library and tools for the WebP graphics format

CVE-2018-25010 is fixed in 6 products on 1 platform, first by libwebp6 0.6.1-2ubuntu0.18.04.1, released December 30, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2018-25010
- Priority: High
- CVSS: 9.8 (Moderate)
- EPSS: 0.0224
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 30, 2018

## Description

The libwebp packages provide a library and tools for the WebP graphics format. WebP is an image format with a lossy compression of digital photographic images. WebP consists of a codec based on the VP8 format, and a container based on the Resource Interchange File Format (RIFF). Webmasters, web developers and browser developers can use WebP to compress, archive, and distribute digital images more efficiently.  Security Fix(es):  * libwebp: out-of-bounds read in WebPMuxCreateInternal (CVE-2018-25009)  * libwebp: out-of-bounds read in ApplyFilter() (CVE-2018-25010)  * libwebp: out-of-bounds read in WebPMuxCreateInternal() (CVE-2018-25012)  * libwebp: out-of-bounds read in ShiftBytes() (CVE-2018-25013)  * libwebp: use of uninitialized value in ReadSymbol() (CVE-2018-25014)  * libwebp: out-of-bounds read in ChunkVerifyAndAssign() in mux/muxread.c (CVE-2020-36330)  * libwebp: out-of-bounds read in ChunkAssignData() in mux/muxinternal.c (CVE-2020-36331)  * libwebp: excessive memory allocation when reading a file (CVE-2020-36332)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.  Additional Changes:  For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libwebp RHEL 8 | 0:1.0.0-5.el8 | [RHSA-2021:4231](https://patchblox.com/security/data/fix/linux/rhsa-2021-4231.md) | Nov 9, 2021 |
| Linux | libwebp almalinux 8 | 1.0.0-5.el8 | [ALSA-2021:4231](https://patchblox.com/security/data/fix/linux/alsa-2021-4231.md) | Nov 9, 2021 |
| Linux | libwebp ol 8 | 0:1.0.0-5.el8 | [ELSA-2021-4231](https://patchblox.com/security/data/fix/linux/elsa-2021-4231.md) | Nov 16, 2021 |
| Linux | libwebp rocky 8 | 0:1.0.0-5.el8 | [RLSA-2021:4231](https://patchblox.com/security/data/fix/linux/rlsa-2021-4231.md) | Nov 9, 2021 |
| Linux | libwebp-devel RHEL 8 | 0:1.0.0-5.el8 | [RHSA-2021:4231](https://patchblox.com/security/data/fix/linux/rhsa-2021-4231.md) | Nov 9, 2021 |
| Linux | libwebp-devel almalinux 8 | 1.0.0-5.el8 | [ALSA-2021:4231](https://patchblox.com/security/data/fix/linux/alsa-2021-4231.md) | Nov 9, 2021 |
| Linux | libwebp-devel ol 8 | 0:1.0.0-5.el8 | [ELSA-2021-4231](https://patchblox.com/security/data/fix/linux/elsa-2021-4231.md) | Nov 16, 2021 |
| Linux | libwebp6 Ubuntu 18.04.6 LTS (bionic) | 0.6.1-2ubuntu0.18.04.1 | [libwebp6 0.6.1-2ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwebp6-0.6.1-2ubuntu0.18.04.1.md) | Dec 30, 2020 |
| Linux | libwebp6 Ubuntu 20.04 LTS (focal) | 0.6.1-2ubuntu0.20.04.1 | [libwebp6 0.6.1-2ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libwebp6-0.6.1-2ubuntu0.20.04.1.md) | Dec 30, 2020 |
| Linux | libwebpdemux2 Ubuntu 18.04.6 LTS (bionic) | 0.6.1-2ubuntu0.18.04.1 | [libwebpdemux2 0.6.1-2ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwebpdemux2-0.6.1-2ubuntu0.18.04.1.md) | Dec 30, 2020 |
| Linux | libwebpdemux2 Ubuntu 20.04 LTS (focal) | 0.6.1-2ubuntu0.20.04.1 | [libwebpdemux2 0.6.1-2ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libwebpdemux2-0.6.1-2ubuntu0.20.04.1.md) | Dec 30, 2020 |
| Linux | libwebpmux3 Ubuntu 18.04.6 LTS (bionic) | 0.6.1-2ubuntu0.18.04.1 | [libwebpmux3 0.6.1-2ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwebpmux3-0.6.1-2ubuntu0.18.04.1.md) | Dec 30, 2020 |
| Linux | libwebpmux3 Ubuntu 20.04 LTS (focal) | 0.6.1-2ubuntu0.20.04.1 | [libwebpmux3 0.6.1-2ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libwebpmux3-0.6.1-2ubuntu0.20.04.1.md) | Dec 30, 2020 |
| Linux | webp Ubuntu 18.04.6 LTS (bionic) | 0.6.1-2ubuntu0.18.04.1 | [webp 0.6.1-2ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-webp-0.6.1-2ubuntu0.18.04.1.md) | Dec 30, 2020 |
| Linux | webp Ubuntu 20.04 LTS (focal) | 0.6.1-2ubuntu0.20.04.1 | [webp 0.6.1-2ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-webp-0.6.1-2ubuntu0.20.04.1.md) | Dec 30, 2020 |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo